Question about Yamaha XT 125 R Motorcycles

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Location of air/fuel mixture screw on Yamaha xt 125 r

I have cleaned my carb but now the problem is it will only start when the choke is on and when I turn it off the bike cuts out so I'm thinking its the air/fuel mixture but I don't know which screw it is I know which one is the idle

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  • Yamaha Master
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Hi, Tom for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://www.yamaha-motor.com/assets/service/manuals/2010/lit-11626-23-37_xt250_2010_1680.pdf

Posted on Feb 01, 2017

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Yamaha TTR 125 L won't idle

The problem is that your idle is adjusted to low just like mine, you need to adjust your idle

Posted on Aug 04, 2009

  • 3567 Answers

SOURCE: Yamaha DT 125 1986 - High Revs when idling

There have an air leak between the carb and the cylinder and/or the head and cylinder. Old hard / cracked rubber fittings and O rings are usually the problem. When extra air gets into the system it leans the fuel mix and the high idle is the result. It also means the engine runs hotter. Also, cracked or broken reeds can be a source.
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Posted on Aug 10, 2009

  • 191 Answers

SOURCE: Ok, i recently purchased a DTR 125 R 2000 model

Sounds like a vacuum leak is leaning out the mixture....check the intake between carb and engine for leaks...another source may be tjhe crankcase seals are leaking.

Posted on Mar 31, 2011

ahlidap1961
  • 79 Answers

SOURCE: what is the standard air

Hi, You have a closed mainjet (need cleaning) as for idling you must screw in all the way and then unscrew 2 turns (that's a standart) and then you only have to do minor adjustments.
As for the needle position they all work the highest grove you set the more fuel to your engine. Start from the lowest, test the bike for power and rpm's and adjust from there
Good luck

Posted on Sep 16, 2011

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